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• Priorities.java

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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved.
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 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
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 *
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package javax.ws.rs;

/**
 * A collection of built-in priority constants for the JAX-RS components that are supposed to be
 * ordered based on their {@code javax.annotation.Priority} class-level annotation value when used
 * or applied by JAX-RS runtime.
 * 

 * For example, JAX-RS filters and interceptors are grouped in chains for each of the message
 * processing extension points: Pre, PreMatch, Post as well as ReadFrom and WriteTo.
 * Each of these chains is sorted based on priorities which are represented as integer numbers.
 * All chains, except Post, are sorted in ascending order; the lower the number the higher the priority.
 * The Post filter chain is sorted in descending order to ensure that response filters are executed in
 * reverse order.
 * 
 * 

 * JAX-RS components that belong to the same priority class (same integer value) are executed in an
 * implementation-defined manner. By default, when the {@code @Priority} annotation is absent on a component,
 * for which a priority should be applied, the {@link Priorities#USER} priority value is used.
 * 
 *
 * @author Marek Potociar (marek.potociar at oracle.com)
 * @since 2.0
 */
public final class Priorities {

    private Priorities() {
        // prevents construction
    }

    /**
     * Security authentication filter/interceptor priority.
     */
    public static final int AUTHENTICATION = 1000;
    /**
     * Security authorization filter/interceptor priority.
     */
    public static final int AUTHORIZATION = 2000;
    /**
     * Header decorator filter/interceptor priority.
     */
    public static final int HEADER_DECORATOR = 3000;
    /**
     * Message encoder or decoder filter/interceptor priority.
     */
    public static final int ENTITY_CODER = 4000;
    /**
     * User-level filter/interceptor priority.
     */
    public static final int USER = 5000;
}